Associate Building Physics Engineer Up to £85k London A leading building services consultancy is seeking an ambitious and technically excellent Principal - Associate Building Physics Engineer to join their London office. This is a rare and exciting opportunity to build a team from the ground up, act as the face of sustainability and building performance, and work towards leading your own P&L function in the near future. With a strong pipeline of technically complex, low-energy projects across commercial, residential, education, and healthcare sectors, this role puts you in a strategic position to shape how building performance is delivered across the UK and Europe. The Role You'll lead the building physics and performance modelling services, guiding clients and design teams toward high-performance, low-carbon outcomes. From early-stage passive design advice to detailed compliance modelling, you'll drive the technical delivery while growing and mentoring a new team around you. Key responsibilities include: * Delivering and reviewing dynamic thermal modelling, energy compliance, and overheating assessments (TM54, TM59, TM52, Part L & O) * Leading the use of tools such as IES-VE, ApacheSim, and Apache HVAC to assess building performance * Supporting Net Zero strategies, carbon assessments, and wider sustainability inputs as needed * Acting as the key client contact, leading presentations, advising design teams, and championing performance-led design * Growing a new team of engineers under your leadership, with support from the wider practice * Contributing to business development and eventually taking ownership of your own P&L responsibility About You * Degree-qualified with 7 years' experience in building physics or sustainable design * Proficient in IES-VE (including Apache HVAC) and familiar with compliance tools and frameworks * Experienced in leading projects and managing client relationships * Strong communicator, confident advising stakeholders and representing the practice externally * Passionate about shaping the future of Net Zero design and performance-driven buildings * Ready to step into a strategic leadership role and grow a specialist team Why Apply? * Define and grow your own building physics & sustainability offering * Work toward owning and managing your own P&L and team structure * Lead the delivery of high-impact projects with technical depth and real-world value * Join a flexible, supportive consultancy that empowers individuals to take ownership * Enjoy hybrid working, chartership support, bonus scheme, CPD, and a collaborative culture Whether you're working in the larger corporate companies or a small SME this is certainly one to take note of. Please don't hesitate to apply or get in touch for further info on the email below, we can arrange a confidential conversation anytime to suit you. Your expert recruitment consultant is Lakshman Sivanesan, call today on (phone number removed) or email (url removed) Eden Brown is committed to equality in the workplace and is an equal opportunity employer. Eden Brown is committed to equality in the workplace and is an equal opportunity employer